I'd find the idea that Israel hadn't targeted the hospital slightly more credible had they not hit two other hospitals and at least one school earlier in this conflict, not to mention the airstrikes on civilian convoys and the Rafah border crossing
The "stray missile which just happened to hit a car park full of fully fuelled cars where all the civilians were hiding" explanation just feels a bit too "workshopped" to me personally
The "stray missile which just happened to hit a car park full of fully fuelled cars where all the civilians were hiding" explanation just feels a bit too "workshopped" to me personally